I went to the Gettysburg National Park website. They have "living history presentations." It would be hard to do that without people playing the roles of confederates.
https://www.nps.gov/gett/planyourvisit/living-history.htm
Point of course is they played their roles as attackers of the union. They were traitors to the United States .The statues don't have sign talking about their crimes but portray them as heroes.